杨健;谢燕翔;

• 1:榆林学院能源工程学院榆林市新材料技术研究中心
• 2:西安文理学院陕西省表面工程与再制造重点实验室

摘要(Abstract)：

以纯Ni粉末作为熔敷材料,用光纤激光器在316L不锈钢表面进行激光熔敷。用SEM、EDS、XRD分析熔敷涂层的组织形貌与物相组成,采用电化学方法研究涂层与基材在3.5%NaCl溶液中的腐蚀行为。结果表明:涂层表面光滑,微观结构致密,与基材结合良好,涂层主要为γ(Ni,Fe)固溶体和FeNi3相,从顶部到底部组织形态依次为等轴晶、柱状晶、胞状晶,界面结合区为平面晶;涂层的自腐蚀电位为-0.13 V,电流密度为5.012×10-7A/cm2,相比于不锈钢基材,涂层的自腐蚀电位提高0.16 V,电流密度降低55.33%,腐蚀阻抗值高于基材,涂层表面钝化膜无夹杂物,完整性更高,点蚀萌生更加困难,同时可降低点蚀扩展速率,保护不锈钢基材。

关键词(KeyWords)： 316L不锈钢;纯Ni粉末;激光熔敷;微观组织;腐蚀行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51601167;51861034);; 陕西省科技统筹重大项目(2016KTZDGY04-03;2018GY-129);; 陕西省教育厅专项科研计划项目(18JK0907)

作者(Author): 杨健;谢燕翔;

Email:

DOI:

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